Ultrasound imaging uses high-frequency sound waves to produce pictures of the inside of the body. It is used to help diagnose the causes of pain, swelling and infection in the body’s internal organs and to examine a baby in pregnant women.

Uvulitis is severe swelling of the uvula. The uvula is the small piece of tissue that hangs in the back of the throat. Uvulitis is usually caused by an infection, an injury to the back of the throat, or an allergic reaction.